I have my class that inherits from the enchantment class, and now I'm wondering how to make this enchant increase its attack speed when applied to an item.

you need to add a AttributeModifier to the Player if the player use your Item

okay but how in some class, event?

I would use LivingEquipmentChangeEvent, then you need check for EquipmentSlot.MAINHAND

then you have the following cases:

• #getTo has your Enchantment -> add the AttributeModifier
• #getTo has not your Enchantment -> remove the AttributeModifier
• Edit: #getFrom and #getTo has your Enchantment -> do nothing

 

Edited June 17, 20223 yr by Luis_ST

@SubscribeEvent
    public static void onChange(LivingEquipmentChangeEvent event){
        if(event.getSlot() == EquipmentSlot.MAINHAND){
            ItemStack stack = event.getTo();

            if(hasAxeSpeed(stack)){
                AttributeModifier atm = new AttributeModifier(UUID.randomUUID(), "Tool modifier", 5, AttributeModifier.Operation.ADDITION);
                stack.addAttributeModifier(Attributes.ATTACK_SPEED, atm, EquipmentSlot.MAINHAND);
            }else{
                var am = stack.getItem().getDefaultAttributeModifiers(EquipmentSlot.MAINHAND);
                am.forEach((attribute, attributeModifier) -> {
                    stack.addAttributeModifier(attribute, attributeModifier, EquipmentSlot.MAINHAND);
                });
            }
        }
    }

    private static boolean hasAxeSpeed(ItemStack pStack) {
        return EnchantmentHelper.getItemEnchantmentLevel(ModEnchantments.AXE_SPEED.get(), pStack) > 0;
    }

O

 

17 hours ago, Luis_ST said:

I would use LivingEquipmentChangeEvent, then you need check for EquipmentSlot.MAINHAND

then you have the following cases:

• #getTo has your Enchantment -> add the AttributeModifier
• #getTo has not your Enchantment -> remove the AttributeModifier
• Edit: #getFrom and #getTo has your Enchantment -> do nothing

 

kay when I change an attribute the damage attribute disappears when inserting and removing an item from slot the speed attribute duplicates. I don't know what I screwed up

6 minutes ago, diesieben07 said:

Nie musisz za każdym razem tworzyć nowego modyfikatora. Utwórz go raz, przechowuj go w statycznym polu końcowym. Używaj również stałego UUID, a nie za każdym razem losowego, w przeciwnym razie nie ma możliwości zidentyfikowania modyfikatora.

Like that

 

private static final UUID BASE_ATTACK_SPEED_UUID = UUID.fromString("FA233E1C-4180-4865-B01B-BCCE9785ACA3");
    private static AttributeModifier atm = new AttributeModifier(BASE_ATTACK_SPEED_UUID, "Tool modifier", 5, AttributeModifier.Operation.ADDITION);

    @SubscribeEvent
    public static void onChange(LivingEquipmentChangeEvent event){
        if(event.getSlot() == EquipmentSlot.MAINHAND){
            ItemStack stack = event.getTo();

            if(hasAxeSpeed(stack)){
                stack.addAttributeModifier(Attributes.ATTACK_SPEED, atm, EquipmentSlot.MAINHAND);
            }else{
                var am = stack.getItem().getDefaultAttributeModifiers(EquipmentSlot.MAINHAND);
                am.forEach((attribute, attributeModifier) -> {
                    stack.addAttributeModifier(attribute, attributeModifier, EquipmentSlot.MAINHAND);
                });
            }
        }
    }

 

How?